Rescuing the Born Rule for Quantum Cosmology

Details Rescuing the Born Rule for Quantum Cosmology Rescuing the Born Rule for Quantum Cosmology

2010-10-17

arxiv.org/abs/1010.3395v2

JCAP 1102:014,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

24 pages; reflects published version

Scientific paper

10.1088/1475-7516/2011/02/014

Page has recently argued that the Born rule does not suffice for computing all probabilities in quantum cosmology. He further asserts that the Born rule's failure gives rise to the cosmological measure problem. Here I contend that Page's result stems from his use of an overly restrictive definition of the Born rule. In particular, I demonstrate that all of the probabilities he wishes to compute follow from the Born rule when generalized measurements are permitted. I also register two comments on Page's theoretical setting, relating respectively to Hilbert space dimensionality and permutation symmetry. These considerations lead me to conclude that the claimed insufficiency of the Born rule is by no means specific to the cosmological context.

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